Smoke-flue damper for feeding air to combustion-chambers.



G. I. MUNSON.

SMOKE FLUE DAMPER FOR FEEDING AIR TO COMBUSTION CHAMBERS.

APBLIOATION FILED JUNE 30,1908.

3W1 .m v m w n 1m W 0 431 a Mm WV GM ,0 1 Y. m y n 8 m a 0 P b WM w 33 09 e g i MP FILED JUNE 30,1908

Patented May 4, 19,09.

2 SHEETS-SHEET 2.

guoaufoz 1x 3 hie/boas 4 albums 55 view one of: the air: inlet UurTESTATES PATENT OFFICE.

-GLADY$ ISABELLA MUNSON, OF INDIANAPOLIS, INDIANA.

'BHOKE -FLU'E DAMPER FOR' FEEDI Specification of Letters Patent.

no AIR 'ro COMBUSTION-CHAMBERS.

Patented May 4, 1909. i

Application filed June 30, 1908. Serial No. 441,181. I

- tion-Cham ers; and I do hereby declare the -'-followingto be a full,'clear, and exact-.description of the invention, such as will enableothers-skilled in the art to which it appertains to make and use thesame.

, For introducing heated air as a combustion effecting medium tothevcombustion: chamber of-astove, -or furnacetlirough the damperedsmoke-flue whereby the mingling of the air with the gases incombustionis ef- -fected with increased and more efficient combustionand the conse uent saving in the consumption of fuel, and to theprevention'of smoke, and in regulating and maintaining a'uniformtemperature of apartmentais the object of my invention. vFor thispurpose I have produced animproved air-heating and feeding damper in thesrnplge fiue, and in the claims. a pended hereto I 'will set .out theparts an combinations of parts wherein my improvements reside inconnection with the accompanying drawings, in. which,

re 1. shows in vertical section a portion of a smoke-pipe having mountedthereinmy' improved air-heating and feeding chain bored-damper, andshowing in section exernal :su' plemental air-heating chambers a d thedirmper. mounting journals passing t rough them, whereby the air isheatedand ex anded beforaenters the damperch mber. 'Fig.. 2.-i a sideelevation of the sal e the damper being shown in dotted 40-1ine isasimilar view taken at right angl s to ig.. 2. Fig. 4 is a horizontalsection of the smoke-pi e I taken above the chambered-dam er. j ig. Me avertical section of the o ambered-damper. Fig. 6 shows in cross sectionthe air heating chami herwhich: supplements the dam er-journal, thesectidnlbeing taken through t ieair register ring of said chamber andshowing the tubular journal extension, the air regulating tube thereinand the'registering air lnlets of said chamber andofthe journal tubes.Fig.

' 7'sho'ws the= tubuiar valveqnember of the damerjournal-=in-l0ngitudinal section A, end and side View C, Fi8-shows'i'n edge ila'nges of the air '=--heating cupswhichsupplement thedamperjournals and which are secured to the outer wall of thesmoke-pipe.

Itwill be understood that my chambered air-feeding damper is mounted inthe smoke- .pipe of. a boiler furnace, heating stove, or cook-stove, andthe air fed into the flue by the chambered-damper, bein of eaterspecific gravity than the smo cam gases which are passingoff from thefuel, descends .;into the combustion-chamber and beingigof fuel. -'Inits function the air feedin dam- 1 per is economical for causing as-mucheat-as possible to pass from the, combustion-cham'- \5 er and ineffecting the conversion ofthe products of combustion noperceptiblequantity ofsmokeis left to pass out. 1

- Vhile the damper'is designed when: ina closed position for feeding'airinto the smokefiue when it is desired to have the full chimney or stackdraft from thecornbustioning.

That raised portion of the cover which crosses the damper forms anupward oblique nited produces a more efficient combustion preferably ofelliptical form is mnting the projecting end ofeach journal.'

to, the' oint of sai rim-with fine through its side walls it has theusual function when in open position-oflleaving a free andunobstructedpassage through the;

across" the upper iortion .of

extension 8 from the upper side of each journal 9 and has a sort ofdownward return loop formation 10 around the center of tho.dam'

per. On each side of this loop-forming rim the edge rim extends from thelower side of each journal as anarm 11, upward-about" oblique tubularextension 12 within the chamber, of each tubular journal 9, which.

latter projects through the flue-wall and forms the air inlets into thedamper-chamber. The arms 11 and the upward curved rim forming-loop parts8 and 10 form'pockets 13 the walls of which give an "upward and downward curved direction to the air entering the chamberthrough thehollowjournals. These oblique damper rim parts 9 and 11 form a hub-bearing 14at each edge of the damper a part of said hub being formed in thedamper-plate 2 and a corresponding part in the chamber cover 3, so thatwhen the two parts are secured together they form the tubularhub-bearing 14 which projects a short distance through openings in theflue-wall. This construction allows the damper to be mounted within theflue by inserting one of the damper-hubs into the wall opening from theinner side of the flue and then pressing the other hub againstthe innerwall of the flue thereby causing it to expand and receive the hub intoits opening and the damper thereb mounted so as to swing upon its journas in the walls of the flue in opening and closing the damper.

' It is important that the airentering the dam er-chamber through thetubular-journals e first heated and its volume controlled. For thispurpose a tubular extension 15 open at both ends isinserted into theprojecting end of each hub-journal, the inner end of such tubularextension being curved or deflected to fit the u ward oblique or curvedtubular hub-formation 9 and 11, and from which said openings 23 as inFig. 8, so that the air pass extension 15 rojects about two inches andis secured to t e outer end of said hub 14 by a circumferential flange16, such tubular extension being made after the damper has been mounted.A cup 17 fastened by flanges to the outer smoke-flue wall supplementsthe projecting end of thehub extension, forms a chamber 5 around it andsupports it. The hub extension is provided with slots 18, Fig. 6, which0 en into the cup-chamber and are controlled hy-registering slots 19 inthe tubular valve 20, Fig. 7, which is 0 en at its inner end and closesthe outer en of the tubularextension by a knobbed-head 21, the turningof which, in either direction, causes the valve to control the slots inthe hub extension; the valve for this pu ose being free to be r0- tatedwithin-the t'u ular-extension and inde pendent of the rotation of thedam' erjournals. The inlets for the air into t ese cupchambers isprovided by scalloping the edges so as to form openin s 22, Fig. 1,whilethe ends of the cupsmay e arched so as to leave ing into thecup-chambers is heated by contact with the walls of the flue, and thehub extension, and passes into and throughjth e tubular-valves into andthrough the tubular-journals and into the damper-chamber,

which; by its peculiar interior formation,

causes theair to be distributed in contact with the hot walls of thedamperand to be-- come highly heated before passing into the smoke-flue.As a furtherprovision for admitting air into the cup-chambers the archedportion of each cup may have a row of openings 24, Fig. 6, controlled bya perforated registering ring 25 on the outerside of the cup. The airregulating valves 20, are each retained in the tubular hub extensionagainst .being withdrawn by .a circumferential cri or bead 26 adapted toengage a correspon ing groove formed on the inner wall of saidhub-extension Fig. 1, and thusfallow the valve to be partially rotatedby its knob to bring its slots 19 in register relation to the.

slots of the hub-extension to regulate the inflow of the air into thedamper chamber, or to close the slots to cut ofi the inflow of the airinto the chamber. 'When the damper is in position to allow full and freeflue-draft the 1 gas thr'eiigh the of the handle will cause the damperto be v swung on its journals and to hold it in its adjusted positionthefollowingmeans are provided: On the outer end of one of the tubularjournal extensions is fixed by a set screw, a collar 29 which isyieldingly held in engagement with the crown of one of the cupairchambers, such' engagement being effected by intermatching annulartoothed edges 30 one on the collar 29 and theother on the crown of saidcup-chamber and a spring 31 at the other cup-chamber yield: inglymaintaining such engagement by exerting a force in alinement with thedamperjournals; For thispurpose the damper is caused to have a slightmovement in the line of and upon its journals, carrying with it thetubular extensions of its journals, whereby the toothed collar 29,.isca'used to be pushed away from and out of engagement with the teethof the cup-air-chamber and the damper thereby left'free to be swung on vits journals. v damper is caused by the attendant ressing the knob ofthe other tubular-journa -extension which causes the dam er-to be movedbodily a ainst the inner 'wa l at the opposite .side of t e smoke fluesufiicient toseparate the toothed'collar 29, from-the crownof thetoothed-cup; side movement of,

This lateral movement of they damper is made against the tensionot-a-coil spring '31 at the handled journal, and which, for this-purposeis housed in grooves in-the meeting faces of'the handle-ring 28 and ofthe. crownof the cup air-chamber as in Fig.

'1, so that'on releasing the pressure from the journalknob the expansionforce of the s ring against the handle-ring 28 will pull t e dampertoward its handled side and thereby cause the automatic engagement ofthe toothed collar 29 with the teeth of the cup-ohamber'to, hold thedamper in its ad justedposition. The tubular valve of one of the damperjournals is held when ad-l justedby a toothed rim 32, at'its knobend anda pin 33, Fig. 1, fasteningsaid toothed-- rim of the valve to thetoothedcollar 29 of the j gagedwith'the grooves of the journal tubularextensions, and for'this purpose, the slots in the valve are open at itsinner end. This construction allows the tubular-valves to betwithdrawnfor cleaning out the tubular journals. For allowing the necessary draftto maintain combustion and the escape of gases which may collect in thatpart of the pipe above the journals the damper is provided-with openingsabove its chambered To revent back-pressure from the damperchamb'er intothe journal bearings, the inner telescoping ends of the tubular journalextensions 15 may each be provided with a cone nozzle 36, standinginward so as to 40 allow the free inflow of'the air into the chamher.The damper-chamber is provided with a man-hole'closed by a removableair-tight cover 37 for cleaning out the chamber.

It is important to note that the damper hubs are formed of thickenedparts of-each of the chamber forming-plates 'and that part 14 whichprojects from the edge of the plates forms a cylindrical journal bearingwith f V which the tubular extensions 15 thereof telescope todeliver'the air into the chamber; that said tubular extension is by aflange screwed to the vertical face 14 of'the journal bearing; that thehandle is fixed upon the outer end of the tubular journal'extension; andthat the latter forms a sleeve within which the tubular-valve 20 isfitted andheld so as to be'roof the interlocking teeth, which ho (is thedamperwhenadjusted, as being-effected by pushing the handled-journalendwise, oh-

viously the pulling swing of the handle will cause the separation of theinterlocking teeth, which will, by the yielding of the spring, be causedto separateand ride over each otherin adjusting the dam er.

I do not desire to confine myse -f to the specific construction andarrangement of the parts herein described and shown, and l reserve therigh-tto make all such changesin and to the same as fairly comowithinthescope and spirit of my invention as set'out in the claims.

I claim: Y

1. In combination with a smoke flue, a

damper mounted 'therein and having tubular journals provided with wallopenings and an an receivinga'nd heating chambencomm'uni eating withsaid journals and provided with exit openings, a-ir' receivingandheating chambers upon the outerwalls'of the smokeflue su plementing andinclosing the-damperjourna s, registering means within the tubularjournals for controlling their wall openings to regulate the feed of theairfrom the charm ers into the damper-chamber, and means for adjustingthe damper, for the purpose stated. p v

2. The combination with a smoke-flue, a damper mounted therein andhaving tubular journals provided with wall openingsand an air receivingand heating chamber communi eating with said journals-and provided *withexit openings, air receiving and heating chambers upon the outer'wallsof the smokeflne su plementing and inclosin-g the dam e=r journ'a s, atubular-valvewithin'each tu ular-journal'and having openings registeringwith the openings inthe tub ular ournals, means for adjustingthetubesrotatively for regulating the air supply to the damperchamber,and means for adjusting the dam per, for the purpose stated.

3. A smoke-flue, a damper mounted therein and having tubular journalspro vided with wallo enin-gs and'an air receiving and heating-c iamberincommu-nication with said journals and provided-with e'xit openingsbelow its journals, chambers upon the outer walls of the smoke-flue suplenienting and inclosing said journals zinc-having air inlet openings, atube within each journal having 0 enings registeriug'with the open-.ings in tie journals and-closing the outer end of each, means forholding eachjtub e within its journal, means for adjusting each tuberotatively for regulating the air supply to the dampenohamber means for.holding each tube in its adjusted position and means for-adjusting thedamper, for-the purpose stated.

4. In a device of the character described, a smoke-flue, a dam ermounted therein-havs and an air-chamber having 0' en- "ing tubularjourna s and'provided with wall openin ings be our the-damper-journals,a.---cup ed and communicating-with it's wall openings,

5 a tube telescoping with and forming an extension of the journalandhaving Wall openings, and a tubular valve within and having openings in,registering relation to those in the journal telescoping tube, means forbold ing the valve tubes within the journals, means for rotativelyadjusting the valve tubes, means for adjusting the damper, and means forretaining it at such adjustment. 4

5. In a device of'the'character described, a smoke-flue, a dam ermounted therein having tubular journa s and an air receiving and.

- discharging chamber havin openings below the darn er journals, a cuped on the outer wall of t e smoke-flue having air inlet opening a chamer surrounding it, aperforated tube within and forming an extension ofthe journal, a tubular valve within and closing the outer end of thejournal extension, and having openings in registering relation tothosein the journal extension, means forholding the valve tubes withinthe journals, knobs for rotating the valve tubesymeans for adjusting thedamper and for holding it in such adjustment consisting of a collar onthe outer end of one of the journals -having a toothed edge adapted "to,engage a toothed edge-on the cup, a handle fixed on the outer end ofthe other journal, and a spring between the handle and the cup to drawthe dam er journals toward it to maintain the 1 tootl ied engagement andto allow the separation of such engagement.

. 6. In a device of the character described, a smoke-flue, a dampermounted therein and having tubular-journals provided with openings andan air receiving and heating chamber rovided with exit openings, thesaid tubu ar-journals ha g each an upward oblique ei rlzensioniifio andopening into a downward deflecting pocket-space on each side of thecenter .of the damper, cup-chambers upon the outer walls of thesmoke-flue supplementing and inclosing the damper ar journals forcontrolling its openings to regulate the'feed of the air from thecupchambers, and means for adjusting the damper for thepur ose stated.

i 7. In a device oft e character described, a smoke-flue, a dampermounted therein and having tubular-journals provided withopenings and anair receiving and heating. chamber rovided with exitopenings, the saidtubu ar journals opening into said chamber on each side of the center ofthe damper, a

cone in each upward journal extension having its nozzle standing inward,cup-chamhers upon the outer walls of the smoke-flue supplementing andinclosing the damper ings and supplementing each journal, form--ournals, registering means within the tubujournals, registering meansWithin the tubular journals for controlling itsv openings to regulatethe feed'of air from thcup-chambers, and means for adjusting the damperfor the purpose stated. f i

8. In an air-feeding damper, a smoke-flue,

a damper mounted therein having an air receiving anddischarging chamberand tubular journals-opening into said chamber, an air receiving andheating chamber fixed upon-v the outer walls of the smoke-flue supple}menting and inclosing each journalfa, erfo-,

rated tubular extension for each j ourna tele-I scoping with andprojectingfrom its outer end and having a circumferential flange forattachment to the end of said journal, a tu bular valve Within theournal extension hav ing slots opening at its inner end, acircumferential crimp adapted to engage a groovein said journalextension, a knob and a toothed on the outer end of the tubular-valvefor closing the outer end of the journal and for rotatively adjustingthe tubular-valve to regulate the feeding of air to the journal.

9. In an air-feeding-damper, a smoke-flue a damper mounted therein andhaving tubular journals and tubular extensions thereof provided withWall openings and having also an air-receiving, heating,- anddischarging chamber into WlllCll the journals open, air

receiving and heating chambers upon the outer walls of the smoke-fluesupplementing and inclosing the damper-journals and their tubularextensions, a tubular-valve Within each tubular journal extension andhaving openings registering with the openings in the latter, and meansfor adjusting said tubes rotatively for regulating the air supply to thedamper-chamber consisting of a knob closing the outer end of saidtubular-valve, a toothed-rim on said knob and a pin ada ted to engagesaid toothed rim with a part edto the tubular extension, and means foradjusting the damper. 10.In an ,air feeding damper, a smokeflue, adamper mounted'therein and having tubular-journals and tubularextensions thereof provided with Wall openings and hav-. ing also an airreceiving, heating, and dis: charging chamber into which the journalsopen, air receiving and heating chambers uponthe outer walls of thesmoke-fiue sup-- plementing and inclosing the damper-journals and theirtubular extensions, a tubularvalve Within each tubular-journal extensionand having openings registering with the openings 1n the latter, meansfor ad usting said tubes rotatively for regulating the supply of air tothe damper-chamber, and means i for holding each tube within the journalconslstlng of a circumferential crimp on sand tube engaging acorresponding groove in the .f

tubular-journal extension, mean s for holding said tubular-valves whenad usted, and

means for adjusting the damper.

11. In combination with a smoke-flue, a means for adjusting said tubularvalves rodamper mounted therein and having tubular ta-tivelyforregulating the air supply to the journals provided with wall openingsand an l damper-chamber. air receiving and heatin chamber commimil Intestimony whereof I have signed my 5. eating with said journa s andprovided with 5 name to this specification in the presence of 1;

exit openings into the flue, that part of the l two subscribingWitnesses.

. tubular journals having 0 enings rojecting GLADYS ISABELLA MUNSOX.

beyond the flue-walls, a tu ular ve ve Within Witnesses: V eachtubular-journal and having openings I CEGILIA A. BEACH,

, 10 registering with the openings therein, and W. G. MUNsoN.

